1 /* $OpenBSD: scp.c,v 1.204 2019/02/10 11:15:52 djm Exp $ */
2 /*
3 * scp - secure remote copy. This is basically patched BSD rcp which
4 * uses ssh to do the data transfer (instead of using rcmd).
5 *
6 * NOTE: This version should NOT be suid root. (This uses ssh to
7 * do the transfer and ssh has the necessary privileges.)
8 *
9 * 1995 Timo Rinne <[email protected]>, Tatu Ylonen <[email protected]>
10 *
11 * As far as I am concerned, the code I have written for this software
12 * can be used freely for any purpose. Any derived versions of this
13 * software must be clearly marked as such, and if the derived work is
14 * incompatible with the protocol description in the RFC file, it must be
15 * called by a name other than "ssh" or "Secure Shell".
16 */
17 /*
18 * Copyright (c) 1999 Theo de Raadt. All rights reserved.
19 * Copyright (c) 1999 Aaron Campbell. All rights reserved.
20 *
21 * Redistribution and use in source and binary forms, with or without
22 * modification, are permitted provided that the following conditions
23 * are met:
24 * 1. Redistributions of source code must retain the above copyright
25 * notice, this list of conditions and the following disclaimer.
26 * 2. Redistributions in binary form must reproduce the above copyright
27 * notice, this list of conditions and the following disclaimer in the
28 * documentation and/or other materials provided with the distribution.
29 *
30 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
31 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
32 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
33 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
34 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
35 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
36 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
37 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
38 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
39 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
40 */
41
42 /*
43 * Parts from:
44 *
45 * Copyright (c) 1983, 1990, 1992, 1993, 1995
46 * The Regents of the University of California. All rights reserved.
47 *
48 * Redistribution and use in source and binary forms, with or without
49 * modification, are permitted provided that the following conditions
50 * are met:
51 * 1. Redistributions of source code must retain the above copyright
52 * notice, this list of conditions and the following disclaimer.
53 * 2. Redistributions in binary form must reproduce the above copyright
54 * notice, this list of conditions and the following disclaimer in the
55 * documentation and/or other materials provided with the distribution.
56 * 3. Neither the name of the University nor the names of its contributors
57 * may be used to endorse or promote products derived from this software
58 * without specific prior written permission.
59 *
60 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
61 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
62 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
63 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
64 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
65 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
66 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
67 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
68 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
69 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
70 * SUCH DAMAGE.
71 *
72 */
73
74 #include "includes.h"
75
76 #include <sys/types.h>
77 #ifdef HAVE_SYS_STAT_H
78 # include <sys/stat.h>
79 #endif
80 #ifdef HAVE_POLL_H
81 #include <poll.h>
82 #else
83 # ifdef HAVE_SYS_POLL_H
84 # include <sys/poll.h>
85 # endif
86 #endif
87 #ifdef HAVE_SYS_TIME_H
88 # include <sys/time.h>
89 #endif
90 #include <sys/wait.h>
91 #include <sys/uio.h>
92
93 #include <ctype.h>
94 #include <dirent.h>
95 #include <errno.h>
96 #include <fcntl.h>
97 #include <fnmatch.h>
98 #include <limits.h>
99 #include <locale.h>
100 #include <pwd.h>
101 #include <signal.h>
102 #include <stdarg.h>
103 #ifdef HAVE_STDINT_H
104 #include <stdint.h>
105 #endif
106 #include <stdio.h>
107 #include <stdlib.h>
108 #include <string.h>
109 #include <time.h>
110 #include <unistd.h>
111 #if defined(HAVE_STRNVIS) && defined(HAVE_VIS_H) && !defined(BROKEN_STRNVIS)
112 #include <vis.h>
113 #endif
114
115 #include "xmalloc.h"
116 #include "ssh.h"
117 #include "atomicio.h"
118 #include "pathnames.h"
119 #include "log.h"
120 #include "misc.h"
121 #include "progressmeter.h"
122 #include "utf8.h"
123
124 extern char *__progname;
125
126 #define COPY_BUFLEN 16384
127
128 int do_cmd(char *host, char *remuser, int port, char *cmd, int *fdin, int *fdout);
129 int do_cmd2(char *host, char *remuser, int port, char *cmd, int fdin, int fdout);
130
131 /* Struct for addargs */
132 arglist args;
133 arglist remote_remote_args;
134
135 /* Bandwidth limit */
136 long long limit_kbps = 0;
137 struct bwlimit bwlimit;
138
139 /* Name of current file being transferred. */
140 char *curfile;
141
142 /* This is set to non-zero to enable verbose mode. */
143 int verbose_mode = 0;
144
145 /* This is set to zero if the progressmeter is not desired. */
146 int showprogress = 1;
147
148 /*
149 * This is set to non-zero if remote-remote copy should be piped
150 * through this process.
151 */
152 int throughlocal = 0;
153
154 /* Non-standard port to use for the ssh connection or -1. */
155 int sshport = -1;
156
157 /* This is the program to execute for the secured connection. ("ssh" or -S) */
158 char *ssh_program = _PATH_SSH_PROGRAM;
159
160 /* This is used to store the pid of ssh_program */
161 pid_t do_cmd_pid = -1;
162
163 static void
killchild(int signo)164 killchild(int signo)
165 {
166 if (do_cmd_pid > 1) {
167 kill(do_cmd_pid, signo ? signo : SIGTERM);
168 waitpid(do_cmd_pid, NULL, 0);
169 }
170
171 if (signo)
172 _exit(1);
173 exit(1);
174 }
175
176 static void
suspchild(int signo)177 suspchild(int signo)
178 {
179 int status;
180
181 if (do_cmd_pid > 1) {
182 kill(do_cmd_pid, signo);
183 while (waitpid(do_cmd_pid, &status, WUNTRACED) == -1 &&
184 errno == EINTR)
185 ;
186 kill(getpid(), SIGSTOP);
187 }
188 }
189
190 static int
do_local_cmd(arglist * a)191 do_local_cmd(arglist *a)
192 {
193 u_int i;
194 int status;
195 pid_t pid;
196
197 if (a->num == 0)
198 fatal("do_local_cmd: no arguments");
199
200 if (verbose_mode) {
201 fprintf(stderr, "Executing:");
202 for (i = 0; i < a->num; i++)
203 fmprintf(stderr, " %s", a->list[i]);
204 fprintf(stderr, "\n");
205 }
206 if ((pid = fork()) == -1)
207 fatal("do_local_cmd: fork: %s", strerror(errno));
208
209 if (pid == 0) {
210 execvp(a->list[0], a->list);
211 perror(a->list[0]);
212 exit(1);
213 }
214
215 do_cmd_pid = pid;
216 signal(SIGTERM, killchild);
217 signal(SIGINT, killchild);
218 signal(SIGHUP, killchild);
219
220 while (waitpid(pid, &status, 0) == -1)
221 if (errno != EINTR)
222 fatal("do_local_cmd: waitpid: %s", strerror(errno));
223
224 do_cmd_pid = -1;
225
226 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
227 return (-1);
228
229 return (0);
230 }
231
232 /*
233 * This function executes the given command as the specified user on the
234 * given host. This returns < 0 if execution fails, and >= 0 otherwise. This
235 * assigns the input and output file descriptors on success.
236 */
237
238 int
do_cmd(char * host,char * remuser,int port,char * cmd,int * fdin,int * fdout)239 do_cmd(char *host, char *remuser, int port, char *cmd, int *fdin, int *fdout)
240 {
241 int pin[2], pout[2], reserved[2];
242
243 if (verbose_mode)
244 fmprintf(stderr,
245 "Executing: program %s host %s, user %s, command %s\n",
246 ssh_program, host,
247 remuser ? remuser : "(unspecified)", cmd);
248
249 if (port == -1)
250 port = sshport;
251
252 /*
253 * Reserve two descriptors so that the real pipes won't get
254 * descriptors 0 and 1 because that will screw up dup2 below.
255 */
256 if (pipe(reserved) < 0)
257 fatal("pipe: %s", strerror(errno));
258
259 /* Create a socket pair for communicating with ssh. */
260 if (pipe(pin) < 0)
261 fatal("pipe: %s", strerror(errno));
262 if (pipe(pout) < 0)
263 fatal("pipe: %s", strerror(errno));
264
265 /* Free the reserved descriptors. */
266 close(reserved[0]);
267 close(reserved[1]);
268
269 signal(SIGTSTP, suspchild);
270 signal(SIGTTIN, suspchild);
271 signal(SIGTTOU, suspchild);
272
273 /* Fork a child to execute the command on the remote host using ssh. */
274 do_cmd_pid = fork();
275 if (do_cmd_pid == 0) {
276 /* Child. */
277 close(pin[1]);
278 close(pout[0]);
279 dup2(pin[0], 0);
280 dup2(pout[1], 1);
281 close(pin[0]);
282 close(pout[1]);
283
284 replacearg(&args, 0, "%s", ssh_program);
285 if (port != -1) {
286 addargs(&args, "-p");
287 addargs(&args, "%d", port);
288 }
289 if (remuser != NULL) {
290 addargs(&args, "-l");
291 addargs(&args, "%s", remuser);
292 }
293 addargs(&args, "--");
294 addargs(&args, "%s", host);
295 addargs(&args, "%s", cmd);
296
297 execvp(ssh_program, args.list);
298 perror(ssh_program);
299 exit(1);
300 } else if (do_cmd_pid == -1) {
301 fatal("fork: %s", strerror(errno));
302 }
303 /* Parent. Close the other side, and return the local side. */
304 close(pin[0]);
305 *fdout = pin[1];
306 close(pout[1]);
307 *fdin = pout[0];
308 signal(SIGTERM, killchild);
309 signal(SIGINT, killchild);
310 signal(SIGHUP, killchild);
311 return 0;
312 }
313
314 /*
315 * This function executes a command similar to do_cmd(), but expects the
316 * input and output descriptors to be setup by a previous call to do_cmd().
317 * This way the input and output of two commands can be connected.
318 */
319 int
do_cmd2(char * host,char * remuser,int port,char * cmd,int fdin,int fdout)320 do_cmd2(char *host, char *remuser, int port, char *cmd, int fdin, int fdout)
321 {
322 pid_t pid;
323 int status;
324
325 if (verbose_mode)
326 fmprintf(stderr,
327 "Executing: 2nd program %s host %s, user %s, command %s\n",
328 ssh_program, host,
329 remuser ? remuser : "(unspecified)", cmd);
330
331 if (port == -1)
332 port = sshport;
333
334 /* Fork a child to execute the command on the remote host using ssh. */
335 pid = fork();
336 if (pid == 0) {
337 dup2(fdin, 0);
338 dup2(fdout, 1);
339
340 replacearg(&args, 0, "%s", ssh_program);
341 if (port != -1) {
342 addargs(&args, "-p");
343 addargs(&args, "%d", port);
344 }
345 if (remuser != NULL) {
346 addargs(&args, "-l");
347 addargs(&args, "%s", remuser);
348 }
349 addargs(&args, "--");
350 addargs(&args, "%s", host);
351 addargs(&args, "%s", cmd);
352
353 execvp(ssh_program, args.list);
354 perror(ssh_program);
355 exit(1);
356 } else if (pid == -1) {
357 fatal("fork: %s", strerror(errno));
358 }
359 while (waitpid(pid, &status, 0) == -1)
360 if (errno != EINTR)
361 fatal("do_cmd2: waitpid: %s", strerror(errno));
362 return 0;
363 }
364
365 typedef struct {
366 size_t cnt;
367 char *buf;
368 } BUF;
369
370 BUF *allocbuf(BUF *, int, int);
371 void lostconn(int);
372 int okname(char *);
373 void run_err(const char *,...);
374 void verifydir(char *);
375
376 struct passwd *pwd;
377 uid_t userid;
378 int errs, remin, remout;
379 int Tflag, pflag, iamremote, iamrecursive, targetshouldbedirectory;
380
381 #define CMDNEEDS 64
382 char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
383
384 int response(void);
385 void rsource(char *, struct stat *);
386 void sink(int, char *[], const char *);
387 void source(int, char *[]);
388 void tolocal(int, char *[]);
389 void toremote(int, char *[]);
390 void usage(void);
391
392 int
main(int argc,char ** argv)393 main(int argc, char **argv)
394 {
395 int ch, fflag, tflag, status, n;
396 char **newargv;
397 const char *errstr;
398 extern char *optarg;
399 extern int optind;
400
401 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
402 sanitise_stdfd();
403
404 msetlocale();
405
406 /* Copy argv, because we modify it */
407 newargv = xcalloc(MAXIMUM(argc + 1, 1), sizeof(*newargv));
408 for (n = 0; n < argc; n++)
409 newargv[n] = xstrdup(argv[n]);
410 argv = newargv;
411
412 __progname = ssh_get_progname(argv[0]);
413
414 memset(&args, '\0', sizeof(args));
415 memset(&remote_remote_args, '\0', sizeof(remote_remote_args));
416 args.list = remote_remote_args.list = NULL;
417 addargs(&args, "%s", ssh_program);
418 addargs(&args, "-x");
419 addargs(&args, "-oForwardAgent=no");
420 addargs(&args, "-oPermitLocalCommand=no");
421 addargs(&args, "-oClearAllForwardings=yes");
422 addargs(&args, "-oRemoteCommand=none");
423 addargs(&args, "-oRequestTTY=no");
424
425 fflag = Tflag = tflag = 0;
426 while ((ch = getopt(argc, argv,
427 "dfl:prtTvBCc:i:P:q12346S:o:F:")) != -1) {
428 switch (ch) {
429 /* User-visible flags. */
430 case '1':
431 fatal("SSH protocol v.1 is no longer supported");
432 break;
433 case '2':
434 /* Ignored */
435 break;
436 case '4':
437 case '6':
438 case 'C':
439 addargs(&args, "-%c", ch);
440 addargs(&remote_remote_args, "-%c", ch);
441 break;
442 case '3':
443 throughlocal = 1;
444 break;
445 case 'o':
446 case 'c':
447 case 'i':
448 case 'F':
449 addargs(&remote_remote_args, "-%c", ch);
450 addargs(&remote_remote_args, "%s", optarg);
451 addargs(&args, "-%c", ch);
452 addargs(&args, "%s", optarg);
453 break;
454 case 'P':
455 sshport = a2port(optarg);
456 if (sshport <= 0)
457 fatal("bad port \"%s\"\n", optarg);
458 break;
459 case 'B':
460 addargs(&remote_remote_args, "-oBatchmode=yes");
461 addargs(&args, "-oBatchmode=yes");
462 break;
463 case 'l':
464 limit_kbps = strtonum(optarg, 1, 100 * 1024 * 1024,
465 &errstr);
466 if (errstr != NULL)
467 usage();
468 limit_kbps *= 1024; /* kbps */
469 bandwidth_limit_init(&bwlimit, limit_kbps, COPY_BUFLEN);
470 break;
471 case 'p':
472 pflag = 1;
473 break;
474 case 'r':
475 iamrecursive = 1;
476 break;
477 case 'S':
478 ssh_program = xstrdup(optarg);
479 break;
480 case 'v':
481 addargs(&args, "-v");
482 addargs(&remote_remote_args, "-v");
483 verbose_mode = 1;
484 break;
485 case 'q':
486 addargs(&args, "-q");
487 addargs(&remote_remote_args, "-q");
488 showprogress = 0;
489 break;
490
491 /* Server options. */
492 case 'd':
493 targetshouldbedirectory = 1;
494 break;
495 case 'f': /* "from" */
496 iamremote = 1;
497 fflag = 1;
498 break;
499 case 't': /* "to" */
500 iamremote = 1;
501 tflag = 1;
502 #ifdef HAVE_CYGWIN
503 setmode(0, O_BINARY);
504 #endif
505 break;
506 case 'T':
507 Tflag = 1;
508 break;
509 default:
510 usage();
511 }
512 }
513 argc -= optind;
514 argv += optind;
515
516 if ((pwd = getpwuid(userid = getuid())) == NULL)
517 fatal("unknown user %u", (u_int) userid);
518
519 if (!isatty(STDOUT_FILENO))
520 showprogress = 0;
521
522 if (pflag) {
523 /* Cannot pledge: -p allows setuid/setgid files... */
524 } else {
525 if (pledge("stdio rpath wpath cpath fattr tty proc exec",
526 NULL) == -1) {
527 perror("pledge");
528 exit(1);
529 }
530 }
531
532 remin = STDIN_FILENO;
533 remout = STDOUT_FILENO;
534
535 if (fflag) {
536 /* Follow "protocol", send data. */
537 (void) response();
538 source(argc, argv);
539 exit(errs != 0);
540 }
541 if (tflag) {
542 /* Receive data. */
543 sink(argc, argv, NULL);
544 exit(errs != 0);
545 }
546 if (argc < 2)
547 usage();
548 if (argc > 2)
549 targetshouldbedirectory = 1;
550
551 remin = remout = -1;
552 do_cmd_pid = -1;
553 /* Command to be executed on remote system using "ssh". */
554 (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s",
555 verbose_mode ? " -v" : "",
556 iamrecursive ? " -r" : "", pflag ? " -p" : "",
557 targetshouldbedirectory ? " -d" : "");
558
559 (void) signal(SIGPIPE, lostconn);
560
561 if (colon(argv[argc - 1])) /* Dest is remote host. */
562 toremote(argc, argv);
563 else {
564 if (targetshouldbedirectory)
565 verifydir(argv[argc - 1]);
566 tolocal(argc, argv); /* Dest is local host. */
567 }
568 /*
569 * Finally check the exit status of the ssh process, if one was forked
570 * and no error has occurred yet
571 */
572 if (do_cmd_pid != -1 && errs == 0) {
573 if (remin != -1)
574 (void) close(remin);
575 if (remout != -1)
576 (void) close(remout);
577 if (waitpid(do_cmd_pid, &status, 0) == -1)
578 errs = 1;
579 else {
580 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
581 errs = 1;
582 }
583 }
584 exit(errs != 0);
585 }
586
587 /* Callback from atomicio6 to update progress meter and limit bandwidth */
588 static int
scpio(void * _cnt,size_t s)589 scpio(void *_cnt, size_t s)
590 {
591 off_t *cnt = (off_t *)_cnt;
592
593 *cnt += s;
594 if (limit_kbps > 0)
595 bandwidth_limit(&bwlimit, s);
596 return 0;
597 }
598
599 static int
do_times(int fd,int verb,const struct stat * sb)600 do_times(int fd, int verb, const struct stat *sb)
601 {
602 /* strlen(2^64) == 20; strlen(10^6) == 7 */
603 char buf[(20 + 7 + 2) * 2 + 2];
604
605 (void)snprintf(buf, sizeof(buf), "T%llu 0 %llu 0\n",
606 (unsigned long long) (sb->st_mtime < 0 ? 0 : sb->st_mtime),
607 (unsigned long long) (sb->st_atime < 0 ? 0 : sb->st_atime));
608 if (verb) {
609 fprintf(stderr, "File mtime %lld atime %lld\n",
610 (long long)sb->st_mtime, (long long)sb->st_atime);
611 fprintf(stderr, "Sending file timestamps: %s", buf);
612 }
613 (void) atomicio(vwrite, fd, buf, strlen(buf));
614 return (response());
615 }
616
617 static int
parse_scp_uri(const char * uri,char ** userp,char ** hostp,int * portp,char ** pathp)618 parse_scp_uri(const char *uri, char **userp, char **hostp, int *portp,
619 char **pathp)
620 {
621 int r;
622
623 r = parse_uri("scp", uri, userp, hostp, portp, pathp);
624 if (r == 0 && *pathp == NULL)
625 *pathp = xstrdup(".");
626 return r;
627 }
628
629 /* Appends a string to an array; returns 0 on success, -1 on alloc failure */
630 static int
append(char * cp,char *** ap,size_t * np)631 append(char *cp, char ***ap, size_t *np)
632 {
633 char **tmp;
634
635 if ((tmp = reallocarray(*ap, *np + 1, sizeof(*tmp))) == NULL)
636 return -1;
637 tmp[(*np)] = cp;
638 (*np)++;
639 *ap = tmp;
640 return 0;
641 }
642
643 /*
644 * Finds the start and end of the first brace pair in the pattern.
645 * returns 0 on success or -1 for invalid patterns.
646 */
647 static int
find_brace(const char * pattern,int * startp,int * endp)648 find_brace(const char *pattern, int *startp, int *endp)
649 {
650 int i;
651 int in_bracket, brace_level;
652
653 *startp = *endp = -1;
654 in_bracket = brace_level = 0;
655 for (i = 0; i < INT_MAX && *endp < 0 && pattern[i] != '\0'; i++) {
656 switch (pattern[i]) {
657 case '\\':
658 /* skip next character */
659 if (pattern[i + 1] != '\0')
660 i++;
661 break;
662 case '[':
663 in_bracket = 1;
664 break;
665 case ']':
666 in_bracket = 0;
667 break;
668 case '{':
669 if (in_bracket)
670 break;
671 if (pattern[i + 1] == '}') {
672 /* Protect a single {}, for find(1), like csh */
673 i++; /* skip */
674 break;
675 }
676 if (*startp == -1)
677 *startp = i;
678 brace_level++;
679 break;
680 case '}':
681 if (in_bracket)
682 break;
683 if (*startp < 0) {
684 /* Unbalanced brace */
685 return -1;
686 }
687 if (--brace_level <= 0)
688 *endp = i;
689 break;
690 }
691 }
692 /* unbalanced brackets/braces */
693 if (*endp < 0 && (*startp >= 0 || in_bracket))
694 return -1;
695 return 0;
696 }
697
698 /*
699 * Assembles and records a successfully-expanded pattern, returns -1 on
700 * alloc failure.
701 */
702 static int
emit_expansion(const char * pattern,int brace_start,int brace_end,int sel_start,int sel_end,char *** patternsp,size_t * npatternsp)703 emit_expansion(const char *pattern, int brace_start, int brace_end,
704 int sel_start, int sel_end, char ***patternsp, size_t *npatternsp)
705 {
706 char *cp;
707 int o = 0, tail_len = strlen(pattern + brace_end + 1);
708
709 if ((cp = malloc(brace_start + (sel_end - sel_start) +
710 tail_len + 1)) == NULL)
711 return -1;
712
713 /* Pattern before initial brace */
714 if (brace_start > 0) {
715 memcpy(cp, pattern, brace_start);
716 o = brace_start;
717 }
718 /* Current braced selection */
719 if (sel_end - sel_start > 0) {
720 memcpy(cp + o, pattern + sel_start,
721 sel_end - sel_start);
722 o += sel_end - sel_start;
723 }
724 /* Remainder of pattern after closing brace */
725 if (tail_len > 0) {
726 memcpy(cp + o, pattern + brace_end + 1, tail_len);
727 o += tail_len;
728 }
729 cp[o] = '\0';
730 if (append(cp, patternsp, npatternsp) != 0) {
731 free(cp);
732 return -1;
733 }
734 return 0;
735 }
736
737 /*
738 * Expand the first encountered brace in pattern, appending the expanded
739 * patterns it yielded to the *patternsp array.
740 *
741 * Returns 0 on success or -1 on allocation failure.
742 *
743 * Signals whether expansion was performed via *expanded and whether
744 * pattern was invalid via *invalid.
745 */
746 static int
brace_expand_one(const char * pattern,char *** patternsp,size_t * npatternsp,int * expanded,int * invalid)747 brace_expand_one(const char *pattern, char ***patternsp, size_t *npatternsp,
748 int *expanded, int *invalid)
749 {
750 int i;
751 int in_bracket, brace_start, brace_end, brace_level;
752 int sel_start, sel_end;
753
754 *invalid = *expanded = 0;
755
756 if (find_brace(pattern, &brace_start, &brace_end) != 0) {
757 *invalid = 1;
758 return 0;
759 } else if (brace_start == -1)
760 return 0;
761
762 in_bracket = brace_level = 0;
763 for (i = sel_start = brace_start + 1; i < brace_end; i++) {
764 switch (pattern[i]) {
765 case '{':
766 if (in_bracket)
767 break;
768 brace_level++;
769 break;
770 case '}':
771 if (in_bracket)
772 break;
773 brace_level--;
774 break;
775 case '[':
776 in_bracket = 1;
777 break;
778 case ']':
779 in_bracket = 0;
780 break;
781 case '\\':
782 if (i < brace_end - 1)
783 i++; /* skip */
784 break;
785 }
786 if (pattern[i] == ',' || i == brace_end - 1) {
787 if (in_bracket || brace_level > 0)
788 continue;
789 /* End of a selection, emit an expanded pattern */
790
791 /* Adjust end index for last selection */
792 sel_end = (i == brace_end - 1) ? brace_end : i;
793 if (emit_expansion(pattern, brace_start, brace_end,
794 sel_start, sel_end, patternsp, npatternsp) != 0)
795 return -1;
796 /* move on to the next selection */
797 sel_start = i + 1;
798 continue;
799 }
800 }
801 if (in_bracket || brace_level > 0) {
802 *invalid = 1;
803 return 0;
804 }
805 /* success */
806 *expanded = 1;
807 return 0;
808 }
809
810 /* Expand braces from pattern. Returns 0 on success, -1 on failure */
811 static int
brace_expand(const char * pattern,char *** patternsp,size_t * npatternsp)812 brace_expand(const char *pattern, char ***patternsp, size_t *npatternsp)
813 {
814 char *cp, *cp2, **active = NULL, **done = NULL;
815 size_t i, nactive = 0, ndone = 0;
816 int ret = -1, invalid = 0, expanded = 0;
817
818 *patternsp = NULL;
819 *npatternsp = 0;
820
821 /* Start the worklist with the original pattern */
822 if ((cp = strdup(pattern)) == NULL)
823 return -1;
824 if (append(cp, &active, &nactive) != 0) {
825 free(cp);
826 return -1;
827 }
828 while (nactive > 0) {
829 cp = active[nactive - 1];
830 nactive--;
831 if (brace_expand_one(cp, &active, &nactive,
832 &expanded, &invalid) == -1) {
833 free(cp);
834 goto fail;
835 }
836 if (invalid)
837 fatal("%s: invalid brace pattern \"%s\"", __func__, cp);
838 if (expanded) {
839 /*
840 * Current entry expanded to new entries on the
841 * active list; discard the progenitor pattern.
842 */
843 free(cp);
844 continue;
845 }
846 /*
847 * Pattern did not expand; append the finename component to
848 * the completed list
849 */
850 if ((cp2 = strrchr(cp, '/')) != NULL)
851 *cp2++ = '\0';
852 else
853 cp2 = cp;
854 if (append(xstrdup(cp2), &done, &ndone) != 0) {
855 free(cp);
856 goto fail;
857 }
858 free(cp);
859 }
860 /* success */
861 *patternsp = done;
862 *npatternsp = ndone;
863 done = NULL;
864 ndone = 0;
865 ret = 0;
866 fail:
867 for (i = 0; i < nactive; i++)
868 free(active[i]);
869 free(active);
870 for (i = 0; i < ndone; i++)
871 free(done[i]);
872 free(done);
873 return ret;
874 }
875
876 void
toremote(int argc,char ** argv)877 toremote(int argc, char **argv)
878 {
879 char *suser = NULL, *host = NULL, *src = NULL;
880 char *bp, *tuser, *thost, *targ;
881 int sport = -1, tport = -1;
882 arglist alist;
883 int i, r;
884 u_int j;
885
886 memset(&alist, '\0', sizeof(alist));
887 alist.list = NULL;
888
889 /* Parse target */
890 r = parse_scp_uri(argv[argc - 1], &tuser, &thost, &tport, &targ);
891 if (r == -1) {
892 fmprintf(stderr, "%s: invalid uri\n", argv[argc - 1]);
893 ++errs;
894 goto out;
895 }
896 if (r != 0) {
897 if (parse_user_host_path(argv[argc - 1], &tuser, &thost,
898 &targ) == -1) {
899 fmprintf(stderr, "%s: invalid target\n", argv[argc - 1]);
900 ++errs;
901 goto out;
902 }
903 }
904 if (tuser != NULL && !okname(tuser)) {
905 ++errs;
906 goto out;
907 }
908
909 /* Parse source files */
910 for (i = 0; i < argc - 1; i++) {
911 free(suser);
912 free(host);
913 free(src);
914 r = parse_scp_uri(argv[i], &suser, &host, &sport, &src);
915 if (r == -1) {
916 fmprintf(stderr, "%s: invalid uri\n", argv[i]);
917 ++errs;
918 continue;
919 }
920 if (r != 0) {
921 parse_user_host_path(argv[i], &suser, &host, &src);
922 }
923 if (suser != NULL && !okname(suser)) {
924 ++errs;
925 continue;
926 }
927 if (host && throughlocal) { /* extended remote to remote */
928 xasprintf(&bp, "%s -f %s%s", cmd,
929 *src == '-' ? "-- " : "", src);
930 if (do_cmd(host, suser, sport, bp, &remin, &remout) < 0)
931 exit(1);
932 free(bp);
933 xasprintf(&bp, "%s -t %s%s", cmd,
934 *targ == '-' ? "-- " : "", targ);
935 if (do_cmd2(thost, tuser, tport, bp, remin, remout) < 0)
936 exit(1);
937 free(bp);
938 (void) close(remin);
939 (void) close(remout);
940 remin = remout = -1;
941 } else if (host) { /* standard remote to remote */
942 if (tport != -1 && tport != SSH_DEFAULT_PORT) {
943 /* This would require the remote support URIs */
944 fatal("target port not supported with two "
945 "remote hosts without the -3 option");
946 }
947
948 freeargs(&alist);
949 addargs(&alist, "%s", ssh_program);
950 addargs(&alist, "-x");
951 addargs(&alist, "-oClearAllForwardings=yes");
952 addargs(&alist, "-n");
953 for (j = 0; j < remote_remote_args.num; j++) {
954 addargs(&alist, "%s",
955 remote_remote_args.list[j]);
956 }
957
958 if (sport != -1) {
959 addargs(&alist, "-p");
960 addargs(&alist, "%d", sport);
961 }
962 if (suser) {
963 addargs(&alist, "-l");
964 addargs(&alist, "%s", suser);
965 }
966 addargs(&alist, "--");
967 addargs(&alist, "%s", host);
968 addargs(&alist, "%s", cmd);
969 addargs(&alist, "%s", src);
970 addargs(&alist, "%s%s%s:%s",
971 tuser ? tuser : "", tuser ? "@" : "",
972 thost, targ);
973 if (do_local_cmd(&alist) != 0)
974 errs = 1;
975 } else { /* local to remote */
976 if (remin == -1) {
977 xasprintf(&bp, "%s -t %s%s", cmd,
978 *targ == '-' ? "-- " : "", targ);
979 if (do_cmd(thost, tuser, tport, bp, &remin,
980 &remout) < 0)
981 exit(1);
982 if (response() < 0)
983 exit(1);
984 free(bp);
985 }
986 source(1, argv + i);
987 }
988 }
989 out:
990 free(tuser);
991 free(thost);
992 free(targ);
993 free(suser);
994 free(host);
995 free(src);
996 }
997
998 void
tolocal(int argc,char ** argv)999 tolocal(int argc, char **argv)
1000 {
1001 char *bp, *host = NULL, *src = NULL, *suser = NULL;
1002 arglist alist;
1003 int i, r, sport = -1;
1004
1005 memset(&alist, '\0', sizeof(alist));
1006 alist.list = NULL;
1007
1008 for (i = 0; i < argc - 1; i++) {
1009 free(suser);
1010 free(host);
1011 free(src);
1012 r = parse_scp_uri(argv[i], &suser, &host, &sport, &src);
1013 if (r == -1) {
1014 fmprintf(stderr, "%s: invalid uri\n", argv[i]);
1015 ++errs;
1016 continue;
1017 }
1018 if (r != 0)
1019 parse_user_host_path(argv[i], &suser, &host, &src);
1020 if (suser != NULL && !okname(suser)) {
1021 ++errs;
1022 continue;
1023 }
1024 if (!host) { /* Local to local. */
1025 freeargs(&alist);
1026 addargs(&alist, "%s", _PATH_CP);
1027 if (iamrecursive)
1028 addargs(&alist, "-r");
1029 if (pflag)
1030 addargs(&alist, "-p");
1031 addargs(&alist, "--");
1032 addargs(&alist, "%s", argv[i]);
1033 addargs(&alist, "%s", argv[argc-1]);
1034 if (do_local_cmd(&alist))
1035 ++errs;
1036 continue;
1037 }
1038 /* Remote to local. */
1039 xasprintf(&bp, "%s -f %s%s",
1040 cmd, *src == '-' ? "-- " : "", src);
1041 if (do_cmd(host, suser, sport, bp, &remin, &remout) < 0) {
1042 free(bp);
1043 ++errs;
1044 continue;
1045 }
1046 free(bp);
1047 sink(1, argv + argc - 1, src);
1048 (void) close(remin);
1049 remin = remout = -1;
1050 }
1051 free(suser);
1052 free(host);
1053 free(src);
1054 }
1055
1056 void
source(int argc,char ** argv)1057 source(int argc, char **argv)
1058 {
1059 struct stat stb;
1060 static BUF buffer;
1061 BUF *bp;
1062 off_t i, statbytes;
1063 size_t amt, nr;
1064 int fd = -1, haderr, indx;
1065 char *last, *name, buf[2048], encname[PATH_MAX];
1066 int len;
1067
1068 for (indx = 0; indx < argc; ++indx) {
1069 name = argv[indx];
1070 statbytes = 0;
1071 len = strlen(name);
1072 while (len > 1 && name[len-1] == '/')
1073 name[--len] = '\0';
1074 if ((fd = open(name, O_RDONLY|O_NONBLOCK, 0)) < 0)
1075 goto syserr;
1076 if (strchr(name, '\n') != NULL) {
1077 strnvis(encname, name, sizeof(encname), VIS_NL);
1078 name = encname;
1079 }
1080 if (fstat(fd, &stb) < 0) {
1081 syserr: run_err("%s: %s", name, strerror(errno));
1082 goto next;
1083 }
1084 if (stb.st_size < 0) {
1085 run_err("%s: %s", name, "Negative file size");
1086 goto next;
1087 }
1088 unset_nonblock(fd);
1089 switch (stb.st_mode & S_IFMT) {
1090 case S_IFREG:
1091 break;
1092 case S_IFDIR:
1093 if (iamrecursive) {
1094 rsource(name, &stb);
1095 goto next;
1096 }
1097 /* FALLTHROUGH */
1098 default:
1099 run_err("%s: not a regular file", name);
1100 goto next;
1101 }
1102 if ((last = strrchr(name, '/')) == NULL)
1103 last = name;
1104 else
1105 ++last;
1106 curfile = last;
1107 if (pflag) {
1108 if (do_times(remout, verbose_mode, &stb) < 0)
1109 goto next;
1110 }
1111 #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
1112 snprintf(buf, sizeof buf, "C%04o %lld %s\n",
1113 (u_int) (stb.st_mode & FILEMODEMASK),
1114 (long long)stb.st_size, last);
1115 if (verbose_mode)
1116 fmprintf(stderr, "Sending file modes: %s", buf);
1117 (void) atomicio(vwrite, remout, buf, strlen(buf));
1118 if (response() < 0)
1119 goto next;
1120 if ((bp = allocbuf(&buffer, fd, COPY_BUFLEN)) == NULL) {
1121 next: if (fd != -1) {
1122 (void) close(fd);
1123 fd = -1;
1124 }
1125 continue;
1126 }
1127 if (showprogress)
1128 start_progress_meter(curfile, stb.st_size, &statbytes);
1129 set_nonblock(remout);
1130 for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
1131 amt = bp->cnt;
1132 if (i + (off_t)amt > stb.st_size)
1133 amt = stb.st_size - i;
1134 if (!haderr) {
1135 if ((nr = atomicio(read, fd,
1136 bp->buf, amt)) != amt) {
1137 haderr = errno;
1138 memset(bp->buf + nr, 0, amt - nr);
1139 }
1140 }
1141 /* Keep writing after error to retain sync */
1142 if (haderr) {
1143 (void)atomicio(vwrite, remout, bp->buf, amt);
1144 memset(bp->buf, 0, amt);
1145 continue;
1146 }
1147 if (atomicio6(vwrite, remout, bp->buf, amt, scpio,
1148 &statbytes) != amt)
1149 haderr = errno;
1150 }
1151 unset_nonblock(remout);
1152
1153 if (fd != -1) {
1154 if (close(fd) < 0 && !haderr)
1155 haderr = errno;
1156 fd = -1;
1157 }
1158 if (!haderr)
1159 (void) atomicio(vwrite, remout, "", 1);
1160 else
1161 run_err("%s: %s", name, strerror(haderr));
1162 (void) response();
1163 if (showprogress)
1164 stop_progress_meter();
1165 }
1166 }
1167
1168 void
rsource(char * name,struct stat * statp)1169 rsource(char *name, struct stat *statp)
1170 {
1171 DIR *dirp;
1172 struct dirent *dp;
1173 char *last, *vect[1], path[PATH_MAX];
1174
1175 if (!(dirp = opendir(name))) {
1176 run_err("%s: %s", name, strerror(errno));
1177 return;
1178 }
1179 last = strrchr(name, '/');
1180 if (last == NULL)
1181 last = name;
1182 else
1183 last++;
1184 if (pflag) {
1185 if (do_times(remout, verbose_mode, statp) < 0) {
1186 closedir(dirp);
1187 return;
1188 }
1189 }
1190 (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n",
1191 (u_int) (statp->st_mode & FILEMODEMASK), 0, last);
1192 if (verbose_mode)
1193 fmprintf(stderr, "Entering directory: %s", path);
1194 (void) atomicio(vwrite, remout, path, strlen(path));
1195 if (response() < 0) {
1196 closedir(dirp);
1197 return;
1198 }
1199 while ((dp = readdir(dirp)) != NULL) {
1200 if (dp->d_ino == 0)
1201 continue;
1202 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
1203 continue;
1204 if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) {
1205 run_err("%s/%s: name too long", name, dp->d_name);
1206 continue;
1207 }
1208 (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name);
1209 vect[0] = path;
1210 source(1, vect);
1211 }
1212 (void) closedir(dirp);
1213 (void) atomicio(vwrite, remout, "E\n", 2);
1214 (void) response();
1215 }
1216
1217 #define TYPE_OVERFLOW(type, val) \
1218 ((sizeof(type) == 4 && (val) > INT32_MAX) || \
1219 (sizeof(type) == 8 && (val) > INT64_MAX) || \
1220 (sizeof(type) != 4 && sizeof(type) != 8))
1221
1222 void
sink(int argc,char ** argv,const char * src)1223 sink(int argc, char **argv, const char *src)
1224 {
1225 static BUF buffer;
1226 struct stat stb;
1227 enum {
1228 YES, NO, DISPLAYED
1229 } wrerr;
1230 BUF *bp;
1231 off_t i;
1232 size_t j, count;
1233 int amt, exists, first, ofd;
1234 mode_t mode, omode, mask;
1235 off_t size, statbytes;
1236 unsigned long long ull;
1237 int setimes, targisdir, wrerrno = 0;
1238 char ch, *cp, *np, *targ, *why, *vect[1], buf[2048], visbuf[2048];
1239 char **patterns = NULL;
1240 size_t n, npatterns = 0;
1241 struct timeval tv[2];
1242
1243 #define atime tv[0]
1244 #define mtime tv[1]
1245 #define SCREWUP(str) { why = str; goto screwup; }
1246
1247 if (TYPE_OVERFLOW(time_t, 0) || TYPE_OVERFLOW(off_t, 0))
1248 SCREWUP("Unexpected off_t/time_t size");
1249
1250 setimes = targisdir = 0;
1251 mask = umask(0);
1252 if (!pflag)
1253 (void) umask(mask);
1254 if (argc != 1) {
1255 run_err("ambiguous target");
1256 exit(1);
1257 }
1258 targ = *argv;
1259 if (targetshouldbedirectory)
1260 verifydir(targ);
1261
1262 (void) atomicio(vwrite, remout, "", 1);
1263 if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
1264 targisdir = 1;
1265 if (src != NULL && !iamrecursive && !Tflag) {
1266 /*
1267 * Prepare to try to restrict incoming filenames to match
1268 * the requested destination file glob.
1269 */
1270 if (brace_expand(src, &patterns, &npatterns) != 0)
1271 fatal("%s: could not expand pattern", __func__);
1272 }
1273 for (first = 1;; first = 0) {
1274 cp = buf;
1275 if (atomicio(read, remin, cp, 1) != 1)
1276 goto done;
1277 if (*cp++ == '\n')
1278 SCREWUP("unexpected <newline>");
1279 do {
1280 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1281 SCREWUP("lost connection");
1282 *cp++ = ch;
1283 } while (cp < &buf[sizeof(buf) - 1] && ch != '\n');
1284 *cp = 0;
1285 if (verbose_mode)
1286 fmprintf(stderr, "Sink: %s", buf);
1287
1288 if (buf[0] == '\01' || buf[0] == '\02') {
1289 if (iamremote == 0) {
1290 (void) snmprintf(visbuf, sizeof(visbuf),
1291 NULL, "%s", buf + 1);
1292 (void) atomicio(vwrite, STDERR_FILENO,
1293 visbuf, strlen(visbuf));
1294 }
1295 if (buf[0] == '\02')
1296 exit(1);
1297 ++errs;
1298 continue;
1299 }
1300 if (buf[0] == 'E') {
1301 (void) atomicio(vwrite, remout, "", 1);
1302 goto done;
1303 }
1304 if (ch == '\n')
1305 *--cp = 0;
1306
1307 cp = buf;
1308 if (*cp == 'T') {
1309 setimes++;
1310 cp++;
1311 if (!isdigit((unsigned char)*cp))
1312 SCREWUP("mtime.sec not present");
1313 ull = strtoull(cp, &cp, 10);
1314 if (!cp || *cp++ != ' ')
1315 SCREWUP("mtime.sec not delimited");
1316 if (TYPE_OVERFLOW(time_t, ull))
1317 setimes = 0; /* out of range */
1318 mtime.tv_sec = ull;
1319 mtime.tv_usec = strtol(cp, &cp, 10);
1320 if (!cp || *cp++ != ' ' || mtime.tv_usec < 0 ||
1321 mtime.tv_usec > 999999)
1322 SCREWUP("mtime.usec not delimited");
1323 if (!isdigit((unsigned char)*cp))
1324 SCREWUP("atime.sec not present");
1325 ull = strtoull(cp, &cp, 10);
1326 if (!cp || *cp++ != ' ')
1327 SCREWUP("atime.sec not delimited");
1328 if (TYPE_OVERFLOW(time_t, ull))
1329 setimes = 0; /* out of range */
1330 atime.tv_sec = ull;
1331 atime.tv_usec = strtol(cp, &cp, 10);
1332 if (!cp || *cp++ != '\0' || atime.tv_usec < 0 ||
1333 atime.tv_usec > 999999)
1334 SCREWUP("atime.usec not delimited");
1335 (void) atomicio(vwrite, remout, "", 1);
1336 continue;
1337 }
1338 if (*cp != 'C' && *cp != 'D') {
1339 /*
1340 * Check for the case "rcp remote:foo\* local:bar".
1341 * In this case, the line "No match." can be returned
1342 * by the shell before the rcp command on the remote is
1343 * executed so the ^Aerror_message convention isn't
1344 * followed.
1345 */
1346 if (first) {
1347 run_err("%s", cp);
1348 exit(1);
1349 }
1350 SCREWUP("expected control record");
1351 }
1352 mode = 0;
1353 for (++cp; cp < buf + 5; cp++) {
1354 if (*cp < '0' || *cp > '7')
1355 SCREWUP("bad mode");
1356 mode = (mode << 3) | (*cp - '0');
1357 }
1358 if (!pflag)
1359 mode &= ~mask;
1360 if (*cp++ != ' ')
1361 SCREWUP("mode not delimited");
1362
1363 if (!isdigit((unsigned char)*cp))
1364 SCREWUP("size not present");
1365 ull = strtoull(cp, &cp, 10);
1366 if (!cp || *cp++ != ' ')
1367 SCREWUP("size not delimited");
1368 if (TYPE_OVERFLOW(off_t, ull))
1369 SCREWUP("size out of range");
1370 size = (off_t)ull;
1371
1372 if (*cp == '\0' || strchr(cp, '/') != NULL ||
1373 strcmp(cp, ".") == 0 || strcmp(cp, "..") == 0) {
1374 run_err("error: unexpected filename: %s", cp);
1375 exit(1);
1376 }
1377 if (npatterns > 0) {
1378 for (n = 0; n < npatterns; n++) {
1379 if (fnmatch(patterns[n], cp, 0) == 0)
1380 break;
1381 }
1382 if (n >= npatterns)
1383 SCREWUP("filename does not match request");
1384 }
1385 if (targisdir) {
1386 static char *namebuf;
1387 static size_t cursize;
1388 size_t need;
1389
1390 need = strlen(targ) + strlen(cp) + 250;
1391 if (need > cursize) {
1392 free(namebuf);
1393 namebuf = xmalloc(need);
1394 cursize = need;
1395 }
1396 (void) snprintf(namebuf, need, "%s%s%s", targ,
1397 strcmp(targ, "/") ? "/" : "", cp);
1398 np = namebuf;
1399 } else
1400 np = targ;
1401 curfile = cp;
1402 exists = stat(np, &stb) == 0;
1403 if (buf[0] == 'D') {
1404 int mod_flag = pflag;
1405 if (!iamrecursive)
1406 SCREWUP("received directory without -r");
1407 if (exists) {
1408 if (!S_ISDIR(stb.st_mode)) {
1409 errno = ENOTDIR;
1410 goto bad;
1411 }
1412 if (pflag)
1413 (void) chmod(np, mode);
1414 } else {
1415 /* Handle copying from a read-only
1416 directory */
1417 mod_flag = 1;
1418 if (mkdir(np, mode | S_IRWXU) < 0)
1419 goto bad;
1420 }
1421 vect[0] = xstrdup(np);
1422 sink(1, vect, src);
1423 if (setimes) {
1424 setimes = 0;
1425 if (utimes(vect[0], tv) < 0)
1426 run_err("%s: set times: %s",
1427 vect[0], strerror(errno));
1428 }
1429 if (mod_flag)
1430 (void) chmod(vect[0], mode);
1431 free(vect[0]);
1432 continue;
1433 }
1434 omode = mode;
1435 mode |= S_IWUSR;
1436 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
1437 bad: run_err("%s: %s", np, strerror(errno));
1438 continue;
1439 }
1440 (void) atomicio(vwrite, remout, "", 1);
1441 if ((bp = allocbuf(&buffer, ofd, COPY_BUFLEN)) == NULL) {
1442 (void) close(ofd);
1443 continue;
1444 }
1445 cp = bp->buf;
1446 wrerr = NO;
1447
1448 statbytes = 0;
1449 if (showprogress)
1450 start_progress_meter(curfile, size, &statbytes);
1451 set_nonblock(remin);
1452 for (count = i = 0; i < size; i += bp->cnt) {
1453 amt = bp->cnt;
1454 if (i + amt > size)
1455 amt = size - i;
1456 count += amt;
1457 do {
1458 j = atomicio6(read, remin, cp, amt,
1459 scpio, &statbytes);
1460 if (j == 0) {
1461 run_err("%s", j != EPIPE ?
1462 strerror(errno) :
1463 "dropped connection");
1464 exit(1);
1465 }
1466 amt -= j;
1467 cp += j;
1468 } while (amt > 0);
1469
1470 if (count == bp->cnt) {
1471 /* Keep reading so we stay sync'd up. */
1472 if (wrerr == NO) {
1473 if (atomicio(vwrite, ofd, bp->buf,
1474 count) != count) {
1475 wrerr = YES;
1476 wrerrno = errno;
1477 }
1478 }
1479 count = 0;
1480 cp = bp->buf;
1481 }
1482 }
1483 unset_nonblock(remin);
1484 if (count != 0 && wrerr == NO &&
1485 atomicio(vwrite, ofd, bp->buf, count) != count) {
1486 wrerr = YES;
1487 wrerrno = errno;
1488 }
1489 if (wrerr == NO && (!exists || S_ISREG(stb.st_mode)) &&
1490 ftruncate(ofd, size) != 0) {
1491 run_err("%s: truncate: %s", np, strerror(errno));
1492 wrerr = DISPLAYED;
1493 }
1494 if (pflag) {
1495 if (exists || omode != mode)
1496 #ifdef HAVE_FCHMOD
1497 if (fchmod(ofd, omode)) {
1498 #else /* HAVE_FCHMOD */
1499 if (chmod(np, omode)) {
1500 #endif /* HAVE_FCHMOD */
1501 run_err("%s: set mode: %s",
1502 np, strerror(errno));
1503 wrerr = DISPLAYED;
1504 }
1505 } else {
1506 if (!exists && omode != mode)
1507 #ifdef HAVE_FCHMOD
1508 if (fchmod(ofd, omode & ~mask)) {
1509 #else /* HAVE_FCHMOD */
1510 if (chmod(np, omode & ~mask)) {
1511 #endif /* HAVE_FCHMOD */
1512 run_err("%s: set mode: %s",
1513 np, strerror(errno));
1514 wrerr = DISPLAYED;
1515 }
1516 }
1517 if (close(ofd) == -1) {
1518 wrerr = YES;
1519 wrerrno = errno;
1520 }
1521 (void) response();
1522 if (showprogress)
1523 stop_progress_meter();
1524 if (setimes && wrerr == NO) {
1525 setimes = 0;
1526 if (utimes(np, tv) < 0) {
1527 run_err("%s: set times: %s",
1528 np, strerror(errno));
1529 wrerr = DISPLAYED;
1530 }
1531 }
1532 switch (wrerr) {
1533 case YES:
1534 run_err("%s: %s", np, strerror(wrerrno));
1535 break;
1536 case NO:
1537 (void) atomicio(vwrite, remout, "", 1);
1538 break;
1539 case DISPLAYED:
1540 break;
1541 }
1542 }
1543 done:
1544 for (n = 0; n < npatterns; n++)
1545 free(patterns[n]);
1546 free(patterns);
1547 return;
1548 screwup:
1549 for (n = 0; n < npatterns; n++)
1550 free(patterns[n]);
1551 free(patterns);
1552 run_err("protocol error: %s", why);
1553 exit(1);
1554 }
1555
1556 int
1557 response(void)
1558 {
1559 char ch, *cp, resp, rbuf[2048], visbuf[2048];
1560
1561 if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp))
1562 lostconn(0);
1563
1564 cp = rbuf;
1565 switch (resp) {
1566 case 0: /* ok */
1567 return (0);
1568 default:
1569 *cp++ = resp;
1570 /* FALLTHROUGH */
1571 case 1: /* error, followed by error msg */
1572 case 2: /* fatal error, "" */
1573 do {
1574 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1575 lostconn(0);
1576 *cp++ = ch;
1577 } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n');
1578
1579 if (!iamremote) {
1580 cp[-1] = '\0';
1581 (void) snmprintf(visbuf, sizeof(visbuf),
1582 NULL, "%s\n", rbuf);
1583 (void) atomicio(vwrite, STDERR_FILENO,
1584 visbuf, strlen(visbuf));
1585 }
1586 ++errs;
1587 if (resp == 1)
1588 return (-1);
1589 exit(1);
1590 }
1591 /* NOTREACHED */
1592 }
1593
1594 void
1595 usage(void)
1596 {
1597 (void) fprintf(stderr,
1598 "usage: scp [-346BCpqrTv] [-c cipher] [-F ssh_config] [-i identity_file]\n"
1599 " [-l limit] [-o ssh_option] [-P port] [-S program] source ... target\n");
1600 exit(1);
1601 }
1602
1603 void
1604 run_err(const char *fmt,...)
1605 {
1606 static FILE *fp;
1607 va_list ap;
1608
1609 ++errs;
1610 if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) {
1611 (void) fprintf(fp, "%c", 0x01);
1612 (void) fprintf(fp, "scp: ");
1613 va_start(ap, fmt);
1614 (void) vfprintf(fp, fmt, ap);
1615 va_end(ap);
1616 (void) fprintf(fp, "\n");
1617 (void) fflush(fp);
1618 }
1619
1620 if (!iamremote) {
1621 va_start(ap, fmt);
1622 vfmprintf(stderr, fmt, ap);
1623 va_end(ap);
1624 fprintf(stderr, "\n");
1625 }
1626 }
1627
1628 void
1629 verifydir(char *cp)
1630 {
1631 struct stat stb;
1632
1633 if (!stat(cp, &stb)) {
1634 if (S_ISDIR(stb.st_mode))
1635 return;
1636 errno = ENOTDIR;
1637 }
1638 run_err("%s: %s", cp, strerror(errno));
1639 killchild(0);
1640 }
1641
1642 int
1643 okname(char *cp0)
1644 {
1645 int c;
1646 char *cp;
1647
1648 cp = cp0;
1649 do {
1650 c = (int)*cp;
1651 if (c & 0200)
1652 goto bad;
1653 if (!isalpha(c) && !isdigit((unsigned char)c)) {
1654 switch (c) {
1655 case '\'':
1656 case '"':
1657 case '`':
1658 case ' ':
1659 case '#':
1660 goto bad;
1661 default:
1662 break;
1663 }
1664 }
1665 } while (*++cp);
1666 return (1);
1667
1668 bad: fmprintf(stderr, "%s: invalid user name\n", cp0);
1669 return (0);
1670 }
1671
1672 BUF *
1673 allocbuf(BUF *bp, int fd, int blksize)
1674 {
1675 size_t size;
1676 #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
1677 struct stat stb;
1678
1679 if (fstat(fd, &stb) < 0) {
1680 run_err("fstat: %s", strerror(errno));
1681 return (0);
1682 }
1683 size = ROUNDUP(stb.st_blksize, blksize);
1684 if (size == 0)
1685 size = blksize;
1686 #else /* HAVE_STRUCT_STAT_ST_BLKSIZE */
1687 size = blksize;
1688 #endif /* HAVE_STRUCT_STAT_ST_BLKSIZE */
1689 if (bp->cnt >= size)
1690 return (bp);
1691 bp->buf = xrecallocarray(bp->buf, bp->cnt, size, 1);
1692 bp->cnt = size;
1693 return (bp);
1694 }
1695
1696 void
1697 lostconn(int signo)
1698 {
1699 if (!iamremote)
1700 (void)write(STDERR_FILENO, "lost connection\n", 16);
1701 if (signo)
1702 _exit(1);
1703 else
1704 exit(1);
1705 }
1706